Psachasius a Roman Catholic divine of the 5th century, flourished at Rome as deacon of a Church about A.D. 490. He was a friend of the antipope Laurentius, and sided with him. Paschasius is reputed to have written De Spiritu Sancto libri duo, quibus symboli enarratio continetur, cadversus errores Macedonii (in "Bibl. Max. Patr." 8:807). Casimir Oudin ascribes the work to Faustus Regiensis.